Selective precipitation of magnetite in copper slag by controlled molten oxidation

Yong Fan, Etsuro Shibata, Atsushi Iizuka, Takashi Nakamura

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Molten oxidation is a sustainable process for direct precipitation of magnetite from melt copper smelter slag because it involves zero or less energy input due to the exothermic reaction and free reducing carbon addition. During molten oxidation, magnetite precipitation occurred preferentially because of its intensive ferromagnetism and large crystal size, which enables downstream magnetic separation. Previous milligram-scale experiments conducted using an infrared furnace show that magnetite could be precipitated, while precipitation of hematite was limited under an atmosphere of 1 vol% oxygen. In this study, gram-scale experiments were conducted using an electric furnace to verify larger-scale molten oxidation at 1 vol% oxygen.

Original languageEnglish
Title of host publicationAdvances in Molten Slags, Fluxes, and Salts
Subtitle of host publicationProceedings of the 10th International Conference on Molten Slags, Fluxes and Salts 2016
EditorsRamana G. Reddy, Pinakin Chaubal, P. Chris Pistorius, Uday Pal
PublisherSpringer International Publishing AG
Pages687-694
Number of pages8
ISBN (Print)9783319486253
Publication statusPublished - 2016 Jan 1
Event10th International Conference on Molten Slags, Fluxes and Salts, MOLTEN 2016 - Seattle, United States
Duration: 2016 May 222016 May 25

Publication series

NameAdvances in Molten Slags, Fluxes, and Salts: Proceedings of the 10th International Conference on Molten Slags, Fluxes and Salts 2016

Conference

Conference10th International Conference on Molten Slags, Fluxes and Salts, MOLTEN 2016
CountryUnited States
CitySeattle
Period16/5/2216/5/25

Keywords

  • Copper Slag
  • Magnetite precipitation
  • Molten oxidation

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Chemistry
  • Metals and Alloys

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